MODEL ATMOSPHERE AND KINEMATICAL ANALYSES OF EARLY-TYPE, HIGH GALACTIC LATITUDE STELLAR CANDIDATES FROM THE UKST UBVRI-SURVEY

From the UKST UBVRI survey, six high Galactic latitude stars have been previously identified which may be young hydrogen-burning objects. Us ing high-dispersion optical spectra, model atmosphere analyses are pre sented for these targets. Two, have normal or nearly normal Population I chemical compositions, one appears to be subluminous while the rema ining three are possibly normal late B-type stars. A kinematic analysi s indicates that one star having normal parameters is an excellent can didate for formation in the halo, having an evolutionary age an order of magnitude less than the time required for it to attain its current position following ejection from the Galactic disk. A preliminary anal ysis implies that there may currently be a few thousand normal B-type stars in the Galactic halo with z-distances from the plane of the Gala xy in the ran 3 < z < 22 k